# Kronos X402 SOL Funding Arbitrage Signal

> Kronos X402 SOL Funding Arbitrage Signal is a paid API for AI agents from kronos-x402.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Fetches real-time cross-venue funding rates for SOL from 6 exchanges and computes the gross and net arbitrage spread between the best short and long venues.

## Facts

- Endpoint: GET https://kronos-x402.vercel.app/api/v1/funding-arb/sol
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kronos-x402-sol-funding-arbitrage-signal-90c32703
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5XQmoVr2xaHtYoIWy-BQX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability kronos-x402-sol-funding-arbitrage-signal-90c32703
```

Example prompt: Check the current cross-venue funding arbitrage signal for SOL — I want to know the gross and net spread in basis points, the annualized yield, and which exchange pair gives the best short-long setup right now.

## When to prefer this

Use this endpoint when you need a pre-computed, multi-venue funding arbitrage signal for SOL specifically, including net-of-fees actionability assessment. Prefer this over manually querying each exchange API when you want a single call that normalizes rates to 8h-equivalent and computes spread automatically.

## Known failure modes

- One or more exchanges return stale or missing data, reducing venue coverage
- Network timeout fetching rates from upstream exchange APIs
- Payment of $0.02 USDC not received, returning 402
- Supabase write fails silently (fire-and-forget, does not affect response)
- Rate limiting from upstream venues causing partial data

## How this service works

Cross-venue funding arbitrage signal from real-time 8h-equivalent funding rates on Binance, OKX, Bybit, KuCoin, Bitget and Hyperliquid. Returns the gross and net-of-fees spread between the best short venue and best long venue (gross_spread_bps, net_spread_bps after a 20 bps round-trip fee estimate), spread_8h_normalized, venues_count, per-venue rates with funding_interval_hours, annualized_pct, and an actionability label. All 16 assets. $0.003 USDC via x402.

## Output

Returns gross_spread_bps (raw spread between highest and lowest funding venue), net_spread_bps (after 20 bps round-trip fee estimate), annualized_pct (yield if held), an actionability label (e.g. 'attractive', 'marginal', 'unattractive'), and per-venue 8h-equivalent funding rates from Binance, OKX, Bybit, KuCoin, Bitget, and Hyperliquid for SOL. Result is also stored to Supabase fire-and-forget.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kronos-x402-sol-funding-arbitrage-signal-90c32703/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kronos-x402.vercel.app](https://www.zero.xyz/host/kronos-x402.vercel.app/llms.txt)